Fair warning: This will not work with every caliper out there. The cost to try it is very low though.

This will switch off the battery completely, so it won't consume standby energy. Original design by PartayPat.

After I've created a cover for PartayPats caliper toggle switch mod and used it for a while, I had some issues with it:

1. The "blade" of the switch was too thin, so it didn't last too long and at some point it was hard getting it to toggle off.
2. Probably more due to the first issue, I kept forgetting, which side was off

So I made a different switch with a stronger blade and added 0/1 labels to the cover to indicate which position is off.

Made with onshape. Feel free to modify to your own needs: link